'''
Book 类
ID_                  unique
name_                string
author_              string
publisher_           string
isRented_            bool
num_of_times_rented_ int

'''

class Book:

    def __init__(self,ID: int,name: str,author: str,publisher: str):
        self.ID_ = ID
        self.name_ = name
        self.author_ = author
        self.publisher_ = publisher
        self.isRented_ = False

        self.num_of_times_rented_ = 0

        return 
    
